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Note 5 - Short Term Contract Obligation (Details Textual)
9 Months Ended
Nov. 30, 2018
USD ($)
a
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Mar. 31, 2019
USD ($)
Payments to Acquire Buildings   $ 100,000  
Short-term Non-bank Loans and Notes Payable   38,000   $ 285,000
Short-term Obligation for Cellana Asset Purchase [Member]        
Debt Instrument, Face Amount $ 180,000      
Debt Instrument, Interest Rate, Stated Percentage 6.25%      
Debt Instrument, Periodic Payment, Number of Monthly Payments 4      
Short-term Non-bank Loans and Notes Payable   0   137,000
Short-term Obligation for Cellana Asset Purchase 2 [Member]        
Debt Instrument, Face Amount $ 215,000      
Debt Instrument, Periodic Payment, Number of Monthly Payments 12      
Short-term Non-bank Loans and Notes Payable       $ 148,000
Debt Instrument, Hold-back, Amount   38,000    
Cellana Asset Purchase [Member]        
Noncash or Part Noncash Acquisition, Value of Assets Acquired, Total $ 495,000 495,000  
Payments to Acquire Buildings 100,000 100,000  
Issuance of Short Term Obligations $ 395,000 $ (395,000)  
Research Facility Owned by Cellana [Member]        
Area of Real Estate Property | a 6